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    <title>Document</title>
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<body>
    <script>
        function every(ele, arr = []) {
            // 声明一个空变量存储 返回值
            let s = 0
            for (let i = 0; i < arr.length; i++) {
                if (arr[i] < ele) {
                    s = false
                    break
                }else {
                    s = true
                }
            }
            
            return s
        }
        console.log(every(10, [30, 10, 30]))
        console.log(every(10, [30, 20, 5]))

    </script>
</body>

</html>